They do important, perhaps someday life saving, work. Take a
look at their site for live web cams of the source of the lava,
Pu’u ‘O’o, Kilauea vent. During the day, there isn’t much to
see, but I am told at night, you can see light from the glowing
molten lava.

Note that the photo below was taken at a location down slope
from Kilauea where the lava eventually enters the sea: